<?php

$users = array( 
    0 => array("id" => 0,
               "username" => "a",
               "password" => "123"),
    1 => array("id" => 1,
               "username" => "b",
               "password" => "456"),
    2 => array("id" => 2,
               "username" => "c",
               "password" => "789")
);

?>